Carbureter.



U. BROWN.

GARBU'RETEH.

APPLICATION FILEDNOV.25,1910.

l,@42,528, Patented @0 3. 2%, 1912.

the lines o;v of Fig. 5.

CLEMENT BROWN, or BIRMINGHAM, ENGLAND:

CARBURETEE.

Specification of Letters Patent.

Patented Get. as, le s.

Application filed November 25, 1910. Serial No. 594,115.

forjnte'r'nal combustion engines, in which the air intake and mixture outlet are simultaneously controlled, by a piston, common to both, and the hydrocarbon nozzle so dise posed as to facilitate intermixing oi the hydrocarbon and air.

The principal objects of my invention are to provide a device simple in constqiction, efiicient in action, and inexpensive to manufacture.

Other objects of my invention will appear in the specification in connection with the accompanying drawing, form ng a part thereof, and in which drawing:

Figure 1 is a central, vertical, sectional view through a carbureter embodying my invention, parts being shown in elevation to more clearly disclose the invention. Fig. 2 is a side elevation of the carbureter disclosed in Fig. 1. Fig. 3 is a sectional view.

on the lines :cm of Fig. 1. Fig. i is a view similar to Fig. 3 showing a modification of nozzle operating means. Fig. 5 is a central, vertical, sectional view of a carbureter embodying the modification of my invention. Fig. 6 is a cross sectional View on the lines 3/ 1 of Fig. Fig. 7 is a sectional view on Similar characters refer to similar parts throughout the several views. A float and chamber of usual construct-ion (not shown in the drawing) maintains a constant level of liquid hydrocarbon in the carbureter nozzle,'which is of the variable orifice type, the normal oil level being indicated at a2:0 of Fig. 1 of the drawing.

Referring more particularly to Figs. 1, 2

and 3, a cylindrical casing 0 has in commu-v nication therewith transversely extending alined ports land 2, the po is 2 being in communication with the engine Slidable within and longitudinally movable with respect to the casing 0,'is a hollow cylindrical piston *d,-the lower marginal edge of which controls the portal and 2. The controlling of the spring.

edge of the piston (Z is in a plane parallel to the axis of the ports 1 and 2, so that at any given position of the piston (Z, the air intake 1 and mixture outlet 2 are regulated'to exactly the same degree. Preferably integral With the internal walls of the piston is a transverse diaphra n 11?, against the upper face of which a hehcal compression spring 6 abuts, and the casing has, at the end removed from the orts l and 2, a screw closure cap 7' which forms the upper abutment A central circular depression in the inner face of the closure cap f accommodates the adjacent extremity of the spring 6 and maintains it in concentric relation with the piston. At the outer face of the cap concentric therewith, is formed an upstanding flange f adapted to receive the end of a casing g as the cap has an axially directed aperture 7 concentri to but rela tively smaller than opening formed toy flange 7, the casing g abutting against the cap f. The flexible incompressible casing g 1 through which passesafiexible inentensible control cable 9 is anchored l} such flange f. One terminal of the cable is attached to the piston, so that the cable may be displaced when it is desired to admit more or less mixture to the engine, and the piston correspondingly moved. This cable is connected to the piston by a headed nipple which is soldered to the cable, or itmay be In the floor of the chamber, suhjacent to the piston 03 is formed an axially directed aperture 0 through which projects the hollow fuel nozzle a and having a fuel discharge oriiice a from which the liquid hydrocarbon. is sprayed. This orifice a is open at the periphery of the nozzle and is regulated by the upper curved or helical niarginal edge it of a rotatable sleeve H concentrically surrounding the nozzle a "i Vhen the sleeve H is rotated in relation to the nozzle, the helical cut-0d edgeh advances ever or recedes from the orifice a according to thedirection of rotation, and thus varies the exposed area thereof, and-consequently the volume fuel induced; It is to be noted that the nozzle a. is disposed to project within the recess 7) of the piston d. formed by the walls thereof. and the diaphragm d, or is alined to deliver hydrocarbon to said recess. At thelower end of the sleeve H is a-too-thed pinion j, the peripheral connected thereto in suitable manner.

- the rack y Fitting in the conical bore of the conical shown in Figs. 2 and 3 of the drawing, and

teeth of" which mesh with a rack j slidably mounted in the casing and actuated in one direction by a coiled tension spring y' attached to a cap j and in the other direction by an inextensible cable 9' slidingtlgrrongh an incompressible casing g anchored n the main casin The cable 9 is attached to in any suitable manner. In order to support the sleeve and appertaining parts, a frusto-conical shell 7' is secured to the under side of the main casing by screws or in any other suitable manner.

shell i is the coned periphery of a depending part 7' of the pozzle a, which part 3 1s a. screw plug 0 screwed into t e conical shell. A peg 4 fixed in the part i engages a slot j in the shell 3' and forms a'locatmg means to insure the correct replacement of the parts, in assembling. Liquid hydrocarbon enters througha hollow radial boss 3 e mouth of t flows into the annular space above the comcal periphery oi the depending part 1' said space being shown in Fig. 1 of the drawlng. The fuel then passes up through the hollow nozzle and is sprayed from the orifice a. The inflowing air traverses the port 1, phsses. under the lower edge of the regulating piston (Z, adjacent port-l, impinges upon the jet and is thereby carbureted, passes under the lower margin of the piston, port 2, and. emerges byway of the'latter port from the carbureter.

In the modification illustrated in Fig. 4, the rack and pinion operating means are replaced by a drum 9 fixed to the lower ex-, tremity of the regulating sleeve H, and formed with a circumferential groove in which the operatingcable g lies. This cable is attached to the drum in any suitable manner. A helical compression spring extends arounda part of the drum periphery to act in a direction counter to that imparted to the drum by the cable 9 A pin g fixed to the drum. to abut against one extremity of the spring 9 and a pin 9 is fixed to the casing to abut against the other extremity of said spring.

In Figs. 5, 6 and 7, the sliding piston and the regulating member of the jet are operatively' -c'onnected together. In such figures, 1 and 2 are the intake and mixture ports, respectively, 0 the casing, d is a piston, e is the spring operating the piston d, f is the closure member of the casing c, g is the operating cable, these parts being similar to the corresponding arts disclosed in Fig. l of the drawing. itting within the interior of the casing 0 is a sleeve having two oppositely disposed helical grooves is cut in its bore. Said sleeve is normally stationary, but may be manually and independently rotated t an,

i the piston d of a cam shape.

thereby. A peripheral slot, (not shown in the drawing), disposed in the casing c allows oscillation of the handle 15. At the upper part of the piston are two diametrically op posite peripheral projections, or keying means d which engage the grooves 70. will beobvious from an inspection of the drawing, that when the piston is displaced axially it is constrained at the same time to revolve by means of the projections 0 working in the helical grooves 70 in the sleeve k.

The transverse diaphragm (Z in has two vertical segmental or keying apertures d. A bifurcated bridle piece as has its arms of bifurcation of similar shape to the said apertures to slidably engagethe same. f of the cap' The combined sliding and rotating movement of the piston causes the bridle to revolve, but not to slide, by reason of the sliding connection between the bridle piece and the piston diaphragm. The spring 6 is arranged in the annular space between the sleeve 70 and the arms of the bridle piece. The bridle piece m is in connection with a stem m,which is connected to a disk valve )1. the marginal cut ofi edge a of which is Subjacent to the valve m; is a nozzle of having a fuel orifice n in its upper face adapted to deliver hydrocarbon to the recess 6 of the piston d. 'When the naive n is rotated, the cam edge more or less closes the 'fuel orifice. The nozzle is held in place by a spring which abuts against a screw cap 0. Fi er washers p and p are provided to prevent leakage.

By operatively connecting the sliding piston and nozzle valves, the arbureter is rendered automatic or semi-automatic, but not withstanding this interconnection, the nozzle may be regulated independently' of the piston by moving the lever t, as clearly shown in Fig. 5.

I. claim:

1. In a carbureter, the combination of a casing having a vertically disposed bore, means forming an inlet port, and a mixture outlet port open laterally to said bore diametrically opposite and alined with respect to each other, a piston having a recessed bottom, vertically movable in said bore and adapted to control the said inlet and outlet ports simultaneously, according to the position of the lower margin of said piston with respect to the openings of said ports, and a nozzle disposed to deliver hydrocarbon to thesaid recessed portion of said piston whereby the air, intlowing throngh said casing, follows a sinuous path trom jacent said outlet port. by a handle t carried; 3

' 2. In a carbureter,the combination of a I The top of the ,said arms are ournaled. in a hollow boss casing having a vertically dl$0$l bore, a

a z i a cap for the upper end oi solo oore leaving an aperture therein, means 'orming an sir inletport mixture open letereliv to said ooze oiamet-r eell o ooo .1 l

Site and illlilEflWltl'i respect a cylindrical shell piston ve in said having {lie intermediate the upper and and adapted to control the inlets end" posit i of the lower margin of said piston with respect'to the openings of seiel ports, a compression spring intergaosecl between ssizl. cap said diaphragm, a nozzle lisposetl to hydrocarbon to seicl TGCSSSfi-ll portion of said piston whereby sir ing through said seeing follows e sinuous pet-h said inlet port uncles lovves margin of said piston adjacent thereto, w said nozzle under the o piston. adjacent said st port,

ooei'ntively co H ture in l 1. I m action solo s xing.

Z'n casing vitlecl l 1 means toning an arc inlet port anti mixture outlet port open to looteelite,- nietrically opposite anti slined with respect, to each other, a piston isving a. recessed bot tom nOVfi-lj'l longitlu-clinsll Within said "more,

provided with keying portions fittinginto "I M .13 oerbureter, the contains-Lion 0 s 4-: 1 e having a veloceh oisposeo oole plow -n lielicel grooves open said *ioel grooves, whereby the seiol pi: e rote v i i 1 its longitudinal mo "nent vvitnin se ial sore, .sirl piston being ell N trol ti o said inlet anal outlet port-s simnlteneoss y according to the position of the lower margin of semi piston respect to o oenings oi? saitl v 231? evel recessed pen sole valve for conroe-orb tion of said iston a so trolling saiel nozzle, a stem for said valve disposed conoentric to the axis of ssitl piston, and keying means. connecting said stem with said piston toliinpa-rt-"cimsmferentiel movement the piston to said stem, but not lol gitudinel movement of tee former to the latter.

carburetor, the combination of a.

ca sin moving a vertically disposed bore pzrowith helical giooves on o. thereto,

n 1g an islet anel a mixture port open is to said. bore diametrically fT posite and mined with respect to each otl.

piston having a recessed bottom movable ion itnelinzilly Wl'tlllill said 0 re, provided "vii-e keying portions fitting into c. cl helical o'ireoves, whereby a said pist states in longitudinal movement wit will here i o'zston being adapted. to cozfltm and outlet ports simulteneoi encoreto the position of the lower margin said piston, rotatable sold nozzle, enrl means ing seiil piston and valve to import o 'erentimoveineitit out not longitflinsl move it the former to the latte 5. In a carburetor, the combinat on oi e.

oesingliaving avertioally disposed. bore pro vicled with helical grooves open "thereto, means forming an all inlet port, and a mix.- ture outlet port open laterally, to said bore spect to each other, a cylindrical shell oiston, longitulinslly movable Within seiol bore, having a diaphragm tlieposetl intemnediete upper and lower ins-Wins, and having keying portions fitlllilg into helical grooves, whereby ssicl piston rotates in longitudlinsl movemeii' Wit-11in "sore, s2 .v elieyhrsgm being provieleel spertures, e115; said piston eoleptetl to control the said inlet and outlet "sorts taneously acoordingto the position lower msvgin of piston vvitli respect he onenings of solid clis oose'" deliver hydroceibon to the 3-" s L Y "1 saiel piston. oelov; tile air flowing through s path from under the lower edge of p ton to seici valve, but not'l mentof the forms? to .6. in a carburetor, the casing ing a veiticellv itisooseo,

letter.

vided vitn lielicel gi ooves o'oen' theseto, Fr 1 cap for the UPPQJ. enol of and sore Raving an apertnse therein, inlet port end mixture outlet port open laterally-to seicl bore tliemetiically opposite and sliiietl with respect to other, linclricsl shell ion U lilin l l Within said sore nevi;

posed intermediate the upon-1 gins thereof and having keying portions ting into said helical grooves Whe'1'eby.-. said piston rotates in its longitudinal Y -g ape-z ta A tla-pteo' to co t leesiicl Oliuliill port mmulmmoai ingto the position of the lower 1 1 piston with respectto a 31 slits, s compression spy (liemetriesll y opposite and slinecl with ie- Y a rotatable valve for eonti'olling ssi 1 l; means tlnongh the a tires in said elienhragm and op "-iveiy connected with said, valve to imeireurnferentisl H1, ve'nentof seicl pislsntlinel move towing en meet within said horses id (lispli' e bein phragm, a rotatable valve for controlling said nozzle, keying means exieneling through the said keyin apertures in said diaphragm and operative y connected to said valve to impart circumferential movement but not longitudinal movement of said piston to said valve, and means operetively eenneeieol to said piston and. extending through' the seiol hand in the presence of two itnesses.

' CLEMENT BROWN.

'Wiinesse, 1

A i'rfiun BROWN, HO LIS Beowze Galilee of this patent may be obtained fox five cents ea h, by addressing the fiommisioiier ofi Patents,

Washington, D.- 8."?

In Witness whereof I have hereunto set my 7 

